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SM ISO690:2012 DEVREESE, Josef T., KLIMIN, Serghei, VAN MECHELEN, J. L.M., DER MAREL, D. Van. Many-body large polaron optical conductivity in SrTi1-xNb xO3. In: Physical Review B - Condensed Matter and Materials Physics, 2010, vol. 81, p. 0. ISSN 1098-0121. DOI: https://doi.org/10.1103/PhysRevB.81.125119 |
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Physical Review B - Condensed Matter and Materials Physics | ||||||
Volumul 81 / 2010 / ISSN 1098-0121 /ISSNe 1550-235X | ||||||
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DOI:https://doi.org/10.1103/PhysRevB.81.125119 | ||||||
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Recent experimental data on the optical conductivity of niobium-doped SrTiO3 are interpreted in terms of a gas of large polarons with effective coupling constant αeff ≈2. The theoretical approach takes into account many-body effects, the electron-phonon interaction with multiple LO-phonon branches, and the degeneracy and the anisotropy of the Ti t 2g conduction band. Based on the Fröhlich interaction, the many-body large polaron theory provides an interpretation for the essential characteristics, except-interestingly-for the unexpectedly large intensity of a peak at ∼130 meV, of the observed optical conductivity spectra of SrTi 1-xNbxO3 without any adjustment of material parameters. |
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Cuvinte-cheie Strontium Titanium Oxide, Two Dimensional Electron Gas, heterostructures |
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<meta name="citation_title" content="Many-body large polaron optical conductivity in SrTi1-xNb xO3"> <meta name="citation_author" content="Devreese Josef T."> <meta name="citation_author" content="Klimin Serghei"> <meta name="citation_author" content="Van Mechelen J. L.M."> <meta name="citation_author" content="Der Marel D. Van"> <meta name="citation_publication_date" content="2010/03/23"> <meta name="citation_journal_title" content="Physical Review B - Condensed Matter and Materials Physics"> <meta name="citation_pdf_url" content="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.81.125119">